Someone asked me to forward to the listserv the responses I received to my question.  Thank you to you all for your many responses.  I did receive the exact number from some of you.  Others suggested places at the census website where I might find the number.  I tried searching some of those but still couldn't find it there.  I will forward an agglomeration of some of those suggestions next.  Nevertheless the US Census provides.  See the attached excel file from Ryan Short which you may save for future reference. 
-----Original Message-----
From: Ryan Short []
Sent: Tuesday, February 13, 2001 2:36 PM
To: Valerie Murdock; Hoekstra, Jay
Subject: RE: [CTPP] population of urbanized area

I have enclosed an Excel spreadsheet that contains 1990 UA code, name, population, area measurement, and population density figures.  The Census Bureau will be releasing its 2000 UA data in 2002.
-----Original Message-----
From: Valerie Murdock []
Sent: Tuesday, February 13, 2001 1:41 PM
Cc: Ryan L Short
Subject: RE: [CTPP] population of urbanized area

I am forwarding your message to Ryan Short who is the UA person for Geography Division.  He will answer your question.

Val Murdock
Geographic Areas Branch
Geography Division
Bureau of the Census
Washington, DC 20233
(301) 457-1099

-----Original Message-----
From: []On Behalf Of Jay Hoekstra
Sent: Tuesday, February 13, 2001 12:07 PM
Subject: [CTPP] population of urbanized area

I don't like to ask for information that I can find by just looking, but I have looked all over the US Census web site and the BTS website for the -
population of urbanized areas, specifically the Grand Rapids, Michigan urbanized area, 1990
But I cannot find it.  Can anyone direct me to a source?  Thanks.  Jay Hoekstra